Information recording/reproducing apparatus reducing disk access frequency to file management area and sharply accelerating record processing and reproduction processing
US6269420A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 8, 1998 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | Dec 8, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D10/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An information recording/reproducing apparatus that is an magneto-optical disk drive apparatus includes a disk controller that is connected to a SCSI controller and controls data transfer from/to a disk rotated by a spindle motor a cache memory temporarily storing data read from and written to the disk, a CPU controlling operation of respective blocks of the apparatus, a program storage that has an analyzing block for analyzing a file management area in the disk, and stores that operational programs for the CPU, and a read/write controller controlling record/reproduction of data to/from the disk. In this construction, since a part of D file management area in the disk is cached all the time at the time of read, data through a plurality of read from operations the boot sector, FAT1, and root directory are sent respectively from the cache memory without accessing the disk. Similarly, although a plurality of write operations are performed respectively to the FAT1, FAT2, and root directory, this plurality of write operation are performed only once with respect to the disk after termination of all the commands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.